JPS5877166A - Self motor equipped with electromagnetic coil - Google Patents

Abstract

PURPOSE:To reduce the spring reset force of a plunger and to drive the plunger quickly and reliably, by constructing such that the current flowing through an electromagnetic coil placed in the magnetic field can be inverted by means of a starter switch. CONSTITUTION:A plunger 1 to be coupled with a shift level for controlling the motion of a pinion gear in a self motor is mounted at the left end of a magnetic means 6 comprised of a permanent magnet pole 8 and an outer tube 9 around said pole 8. A coil 10 is arranged in a tubular magentic gap 10 between the pole 8 and the tube 9, where the right end of said pole 8 is facing against a adsorbing member 12 while a rod 14 is inserted through said member 12 and a movable contact 13 of a switch 23 is mounted on the right end. Upon the function of a starter switch 4, the current will flow through a coil 7 to move the pole 8 to the right thus to function the switch 23 and to self hold the pole 8 to the adsorbing member.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a starter motor device mainly used to start a car engine, and particularly to a starter motor equipped with an electromagnetic filter for engaging a ring gear with a pinion gear attached to the shaft of the starter motor. Regarding equipment.

■ Prior art A conventional starter motor device has a solenoid, and the magnetic attraction force of this solenoid causes the pinion gear of the starter motor to engage the ring gear.

Regardless of the direction of the current, the solenoid attracts the plunger when it is energized, and when it is not energized, it pushes out the plunger using the elasticity of the spring without relying on magnetic force. In addition, when the plunger is attracted, a strong suction force is generated, but when the stroke is long, the initial suction force of the plunger becomes weak.

The pinion gear is engaged with the ring gear with strong force, and
In order to reliably separate the jammed pinion gear from the ring gear and to quickly separate the movable contact of the switch that controls the starter motor directly or via a relay from the fixed contact, a spring is needed to return the solenoid plunger to its original position. must be made considerably stronger, and the solenoid current must be increased to overcome this spring and drive the plunger, and the solenoid consumes a large amount of power, increasing the battery load when starting the engine. In addition, the solenoid is large, generates a lot of heat, and is expensive.

An example of a conventional starter motor device is shown in FIG.

In this device, in order to increase the attraction force of the plunger 1, the solenoid has two circuits of fills 2.3. When the starter switch 4 is turned on, both coils 2.3 are energized to generate a strong attraction force, which drives the plunger 1 with a strong force to attract it. After the plunger 1 is attracted, one coil 30 is de-energized and only one coil 2 is energized to maintain the attracted state. When returning the plunger 1, a current is applied in the opposite direction to one of the coils 3, so that the magnetic fluxes generated by both coils 2.3 cancel each other out, and the strong push of the return spring 5 eliminates the magnetic attraction force. The pressure causes the plunger 1 to return to its original state.

For example, in the two circuits of the solenoid and the coil 24.3, the resistance of the suction holding coil 2 is about 0.7Ω, and one coil 3 of the
The current is quite low at approximately 0.3Ω, and when 10V is applied, the holding coil consumes approximately 14A and one of the ponds consumes approximately 3OA, which is quite large, and when both fills are energized, a large current of over 40A-F is consumed. .

The large current of TsureMade overcomes the strong spring 5 that quickly returns the plunger 1, and it is necessary to forcibly attract it with a long stroke.

A current of several tens of amperes further places a load on the overloaded battery in the starter motor main body, reducing the starting performance of the engine.

■ Purpose The present invention was developed with the aim of eliminating these drawbacks, and an important purpose of the present invention is that the direction of the force generated depending on the direction of the current applied to the coil can be reversed, and the magnetic field and current can be reversed. The force generated between the pinion gear and the ring gear can drive the plunger both in the direction in which the pinion gear engages with the ring gear and in the direction in which it is removed from the engagement state, weakening the pressing force of the spring that returns the plunger to its original position. To provide a starter motor device that can quickly recover.

■ Structure The starter motor device of the uninvented construction can be used as is in the conventional structure such as the starter motor main body and the left lever for driving the pinion gear of this motor main body.
Examples of the electromagnetic coil will be described in detail below.

The electromagnetic coil shown in FIG. 2 includes a magnetic means 6 and a coil 7.

The magnetic means 6 consists of a central cylinder 8 and an outer cylinder 9 located between the cylinders 8, the cylinder 8 is a permanent magnet, the cylinder 8 and the outer cylinder 9 are connected at the left end, and the cylinder 8 and the outer cylinder 9 are connected at the left end. A cylindrical magnetic gap 10 is formed. magnetic gap 10
By a cylindrical permanent magnet, opposing surfaces, that is, the outer peripheral surface of the cylinder 8 and the inner surface of the IAAs 2, are magnetized to different magnetic poles and maintained at a predetermined magnetic flux density. Magnetic space @1
The magnetic field line at 0 points in the radial direction of the cylinder 8 and the outer cylinder 9.

The magnetic means 6 shown in FIG. 2 is housed in a casing 11 so as to be freely movable in the axial direction. The casing 11 is made of a non-magnetic material such as synthetic resin or brass so as not to affect the magnetic circuit of the magnetic means 6.

However, if the plunger 1 is to be held in an attracted state by the magnetic attraction force of a permanent magnet, as shown in FIG. Set up According to this structure, the plunger 1 can be held in the attracted state with no current flowing through the coil 7 or with a weak current.

The adsorbent 12 can be disposed on the surface with which the tip of the outer tube 9 comes into contact, as shown by the chain line, or it can be disposed on both the outer tube 9 and the tip of the cylinder 8.

The plunger 1 projects from the left end of the cylinder 8, and the rod 14 that drives the movable contact 13 of the switch projects from the right end.

A movable contact 13Fi of the switch is insulated and inserted through a rod 14 so as to be freely movable in the axial direction, and is pressed in the direction of a fixed contact 16 by a push spring 15.

Opposed to the movable contact 13, two fixed contacts 16 are arranged on the casing 11, and when the magnetic means 6 is moved to the right, the movable contact 13 comes into contact with the fixed contact 16.

The switch controls energization to the starter motor body directly or via a relay. Since the switch that directly controls the energization of the starter motor controls a large current of 100 to 200 A, it is preferable to increase the speed at which the movable contact 13 is pulled apart to minimize the occurrence of arcs.

The left end of the plunger 1 is connected to a shift lever that controls the movement of a conventional solenoid and pinion gear.

The coil 7 is arranged in the magnetic gap 10 and has a cylindrical shape, and is wound in a direction perpendicular to the direction of the magnetic flux and the axial direction of the cylindrical magnetic gap. coil 7
and the magnetic means 6 are relatively movable in the axial direction. Therefore, seven coils and two magnetic means 6 are disposed in the magnetic gap 10 and fixed to the casing 11 so as to be movable in the axial direction. When the coil 7 is energized, an electromagnetic force acts between the filter T and the magnetic means 6, the magnetic means 6 is driven by this force, and the plunger 1 fixed to the magnetic means 6 drives the shift lever.

In the electromagnetic coil shown in FIG. 3, a magnetic means 6 is fixed to a casing 11, a coil 7 is movable in the axial direction, and a plunger 1 is connected to the coil 7.

In the magnetic means 6, a cylinder 17 and an outer cylinder 1B are connected at the right end, and a through hole 19 is bored through the right end as shown in FIGS. 3 and 4.

The coil 7 is disposed in the magnetic gap 10 so as to be movable in the axial direction, the plunger 1 is fixed to the left end, the rod 20 which is slidable in the through hole 19 is fixed to the right end, and the rod 20 is fixed to the right end.
The tips of the two are connected to each other, and the movable contact 13 of the switch is attached to the tip.

The movable contact 13II'i of the switch is inserted through the rod 20 so as to be slidable in the axial direction while being insulated, and is pressed toward the fixed contact 16 by the push spring 15.

The coil 7 has one circuit or two circuits, and the control circuit of one fill circuit is shown in FIGS. 5 to 7.

In this figure, the starter motor main body 21Fi is connected to the + side of the battery 22 via the switch, and the coil 7 is connected in series to the starter switch 4, which is connected to the switches 23 and l of the starter motor main body 21. Starter switch 4Vi2! ! ! One contact is connected to the battery and one of the contacts is connected to ground.

How this circuit works: First, as shown in Figure 5, when the starter switch 4 is switched to the side that connects the battery 22 and the coil 7, the coil 7 and starter motor main body 21 are energized, and the current in the coil 7 causes the plunger to move. While being driven, the switch 23 of the starter motor main body 21 is closed as shown in FIG.

When the switch 23 is closed, the plunger engages the pinion gear with the ring gear via the shift lever.

When the switch is closed, both ends of the coil 7 are short-circuited 9, and a large current is supplied from the battery 22 directly to the starter motor body without passing through the filter 7, and the starter motor body 21 supplies the engine with a large current. [Drives the closed ring gear.]

When the coil 7 and the magnetic means are de-energized, the force acting on the coil 7 and the magnetic means becomes zero. Therefore, in order to maintain the state in which the pinion gear is engaged with the ring gear in the state shown in FIG. 6, that is, the state in which the magnetic means is moved to the right in FIG.
The right end of the magnetic means is attracted to the adsorbing material 12 by the magnetic adsorption force of the permanent magnet of the magnetic means. In this way, a self-holding device that uses only the magnetic adsorption force of the magnetic means rotates the starter motor body. When this happens, the current in the coil can be reduced to zero, reducing the load on the battery.

When the engine is started 11H1 and the starter switch 4 is switched to the state shown in FIG. 7, a current flows through the coil 7 in the opposite direction to that shown in FIG. The actuation opens the contacts of the switch 23 and the plunger separates the pinion gear from the ring gear via the shift lever.

Although not shown, when the switch is opened, the fill and starter motor are de-energized, and the magnetic means moved to the left in FIG. 2 is held in that position by the fill spring.

At the same time as the switch 23 opens, the power supply to the Koishifu 0 is cut off, but since the movable contact 13 of the switch can move somewhat in the axial direction and is pressed toward the fixed contact, the right end of the magnetic means is quite far away from the adsorption piece. After the switch 23 is opened,
Koishifu 0 energization stopped I! , it will not be pulled back to the adsorbent 12 by the magnetic attraction force of the permanent magnet of the magnetic means 6.

A two-circuit coil control circuit is shown in FIGS. 8-10.

The two circuit coils Lv%LCFi are wound in the same direction, and when energized in the direction shown in Figure 8, the plunger is driven in the direction in which the pinion gear is engaged with the ring gear and in the direction in which the switch is closed. is connected to.

The coil Lv holds the switch 23 closed and the plunger in a state where the pinion gear is engaged with the ring gear, and changes the direction of the coil LCH1 current to drive the plunger in both directions.

The operation of this circuit is as shown in FIG. 8, when the starter switch 4 is closed, current flows in the same direction through the coils Lv and LC, driving the plunger in the direction of closing the switch 23.

When the plunger 23 is driven, as shown in FIG. 9, the switch 23 is closed and the pinion gear is engaged with the ring gear via the shift lever.The coil Lc is de-energized and only the coil Lv is energized. The starter motor body 21 is held in a levered state and energized to start the engine.

When the starter switch 4 is switched to the position shown in Fig. 10 after starting the engine, both ends of the coil Lvtj are short-circuited, the current is cut off, and the coil Lc is energized in the opposite direction.The fill Lc causes the plunger to remove the pinion gear and close the switch. After that, a switch (not shown) is opened, and the coil 7 and starter motor main body 21 are driven in the opening direction.
Power is cut off.

■ Effects In the starter motor device configured as described above, the direction of the force generated by the electromagnetic coil changes the direction of the current, and the direction of the force generated is reversed.In other words, the plunger and the gear are engaged by the current flowing in the magnetic field. Since it can be driven both in the direction of the gear and in the direction of removing the gear, compared to conventional models that only drive in one direction, the pressing force of the spring that returns the plunger to its original position is weaker, allowing the plunger to be moved quickly and quickly. Achieve high efficiency for reliable driving.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view of a conventional starter motor device, FIGS. 2 and 3 are sectional views showing only the electromagnetic coil of the starter motor device according to an embodiment of the present invention, and the second through view is a schematic sectional view of a conventional starter motor device. The line sectional views of FIGS. 5 to 10 are circuit diagrams of a circuit for controlling energization of the electromagnetic coil. 1.Plunger, 211.Coil, 3..Coil, 4
・・Starter switch, 511・Spring, 6-・
Magnetic means, T...Coil, 8...Cylinder, 9...Outer tube, 1
0... Magnetic gap, 11... Casing, 12 @ Adsorption body, 13 Fist - Movable contact, 14... Rod, 15... Push spring, 16... Fixed contact, 17... Cylinder, 18... e outer cylinder. ,1
9...Through hole, 20＠･Rod, 21...Selector motor body, 220＠Battery, 23＠･Switch, Applicant Norio Akamatsu Yasuhiro Toyosu Figure 4 Figure 5 Figure 3

Claims (1)

[Claims] (1) An electromagnetic coil includes a magnetic means and a coil, the magnetic means has a cylindrical magnetic gap with a permanent magnet, and this magnetic gap lIj is opposed to each other by the permanent magnet. The surfaces are magnetized by different magnetic poles to maintain a predetermined magnetic flux density, and the coil has an annular shape disposed within the cylindrical magnetic gap of the magnetic means, and the coil is arranged in the cylindrical magnetic gap of the magnetic means, and the coil is arranged in the cylindrical magnetic gap in the direction of the magnetic flux as well as in the axial direction of the cylindrical magnetic gap. It is wound in a direction that intersects with
The coil and the magnetic means are relatively movable in the axial direction, and a plunger connected to a shift lever KP for controlling the movement of the pinion gear is connected to one of them, and by energizing the coil, the coil and the magnetic means are A starter motor device including an electromagnetic filter configured to have an electromagnetic force acting between the electromagnetic field and drive the shift lever by the force generated by the current in the magnetic field. (2) A cell motor device comprising an electromagnetic filter according to claim 11, wherein the coil is fixed to the casing, the magnetic means is movable in the axial direction, and the plunger is connected to the magnetic means. (31) A starter motor device comprising an electromagnetic coil according to claim 1, in which the magnetic means is fixed to the casing, the coil is movable in the axial direction, and the plunger is connected to the fill. (4) The coil has one circuit. , a starter motor device l comprising an electromagnetic coil according to claim (1), in which the direction of energization of the coil is changed and the direction of the force generated between the coil and the magnetic means is reversed. (6) A starter motor device comprising an electromagnetic coil according to claim 11, wherein the electromagnetic coil has a plurality of circuits, and the direction of the force exerted on the coil is changed by changing the energization state of each circuit. A starter motor device comprising an electromagnetic coil according to claim 1, wherein a switch that turns on and off electricity to the starter motor main body is controlled through the switch, and a coil is connected to the switch to control the energization state.